Bump actions/checkout from 4.2.2 to 6.0.3

Bumps [actions/checkout](https://github.com/actions/checkout) from 4.2.2 to 6.0.3.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@11bd719...df4cb1c)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349